Temperature-register for cars.



RfF. BLOW & G. W. SANDIPORD.

TEMPERATURE REGISTER FOR CARS.

APPLICATION FILED JULY 2, 1912.

1,081,200. Patented Dec. 9, 1913.

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ROBERT FRANKLIN BLOW AND GREEN 'W. SANDIFORD, OF MOBILE, ALABAMA, ASEIGN- OBIS OF NINE TWEllTZ-FOURTHS T0 FAUL P. LUCKLING, THREE TWENTli-FOURTHS TO JACOB MARKSTEIN, ONE TVI'ENTY-FGURTH TO WILLIAM C. BAUMHAUER, AND ONE TWENTY-FOURTH TO JACUB RUBEL, ALL OF MOBILE, ALAEAIUIA.

TEMPERATURE-REGISTER FOR CARS.

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Application filed July 2, 1912.

To all whom it may concern:

Be it known that we, ROBERT F. BLow and W. SANDIFORD, citizens of the United States, residing at Mobile, in the county of Mobile and State of Alabama, have invented new and useful Improvements in Temperature-Registers for Cars, of which the following is a specification.

This invention relates to temperature registers for refrigerator cars, the object in view being to provide a simple device of the class referred to which is adapted, by reason of its construction, to be seated flush in the wall of an ordinary refrigerator car, without affording any projection either from the outer or inner surface of the ear wall, the device being particularly valuable in the care of perishable goods or shipments in transit, effecting a great saving in time and expense to the railroad company, for the reason that one man can perform, in a comparatively short time, the work now requiring a number of men for a considerable period of time, and also rendering it un necessary to open up or break the seals of the cars, containing perishable produce, such as fruits, vegetables, and the like.

With the above and other objects in view, the invention consists in the construction, combination and arrangement of parts, as will be hereinafter more fully described, illustrated in the accompanying drawings, and pointed out in the claims hereunto appended.

In the drawings: Figure 1 is a side elevation of a temperature register, embodying the present invention, and shown applied to a car wall. Fig. 2 is an enlarged vertical transverse sectional view through the same. Fig. 3 is a horizontal section through the register. Fig. 4 is a bottom plan View of portion of the register, showing the ventilating valve, etc.

The register contemplated in this invention comprises essentially a quadrilateral frame, comprising the two oppositely arranged parallel. sides or jamlos 1, top or cap 2, and bottom or sill 3. The depth of this frame from front to rear is approximately the same as the thickness of a car wall, it being understood that the walls of refrigerator cars are generally made hollow, or constructed to comprise an outer and an Specification of Letters Patent.

Patented Dec. 9, 1913.

Serial the. M7347.

inner wall spaced apart to leave an intervening air space which acts, to greater or less degree, as an insulation between the inside and outside atmosphere.

Secured to the front of the frame of the register and directly to the side jamhs 1 are parallel guide strips or cleats 6, the same being rabbeted to receive a vertically slidable weather-proof shutter 7 having a finger lift 8 at its upper end, and having the lower end thereof bent inward to form a stop flange 9 which, in the upward movement of the shutter, comes into contact with the cap or top 2 and prevents the entire removal and consequent loss of the shutter 7. This shutter, together with the strips 6, forms an eifective seal against the admission of water, snow, and the like to the interior of the register, and also to a great on tent excludes the outside atmosphere.

The front wall of the register is formed by two glass panes 10 and 11 arranged at any suitable distance apart, as shown in Figs. 2 and 3, the two panes being separated by an intervening stop 12, while outer and inner steps 13 and 14-, respectively, are arranged in front of the plate 10 and behind the plate 11., so as to securely retain said plates or panes in position. Furthermore, in order to insure air tight contact, rubber gaskets 15 and 16 extend entirely around the outer margins or edges of the panes 10 and 11, and between the steps 12, 13 and 14:,

it being understood that the stops referred to are tightly compressed. against the panes and the rubber gaskets, preparatory to se curing said stops pern'ianently in position. This effectively seals the space between the panes 10 and 11, so that air may be exhausted therefrom to form a vacuum chamher. For this purpose, an air exhaust valve 17 is arranged in an exhaust pipe 18 entering through one of the side walls or jambs 1 of the frame of the register, as shown in Figs. 2 and 3, and if desirec, said tube may be in the form of an elbow, or provided with a right angular extension 19 to facilitate the application thereto of an exhaust pump, as shown in Fig. 3.

Back of the vacuum chambered wall, just hereinabove described, is fastened a thermometer 20 secured fixedly in place, and just back of the thermometer, the bottom wall or sill 3 is provided with an opening 21 eX- tending through the same from top to bottom, the lower portion of the opening being enlarged or rabbeted, as shown at 22, to receive a spring valve 23 which is secured at one end, as shown at 24:, within the rabbeted portion 22 of the recess, the other end being left free, so that air in a limited quantity may pass by said valve, either to or from the compartment in which the thermometer is located. The sill 8 is further provided in the botom thereof with a groove 25 extending from front to back and communi eating with the recess 22, while within said groove is arranged a rubber tube 26 forming an air duct and held in place by means of a keeper plate 27 screwed or otherwise fastened as shown at 28 to the bottom of the register. In case the inside temperature of the car rises considerably, on account of the heat thrown off by the produce, to a point above the outside atmospheric temperature, the air duct 26 will carry off the stagnant air contained in the compartment in which the termometer is located.

The back of the thermometer compartment is closed by a suitable sealing or backboard 29 which may consist of the lining or sealing of the car itself, the same being provided with a number of perforations 30 to equalize the temperature of the interior of the car and the compartment 20, in which the thermometer is mounted.

hat is claimed is:

A temperature register for refrigerator cars, comprising a frame of a depth equal to the thickness of the car wall, said frame being set flush in said wall, awacuum chambered outer wall for said register defined by spaced outer and inner panes of glass, an

exhaust valve communicating with the vacuum chamber, a thermometer located back of said chamber, a perforated sealing wall closing the back of said frame and forming a thermometer compartment behind the chambered outer wall, the marginal wall of the frame being provided with an open ing leading into the thermometer compart ment and an air duct leading to said opening and aifording communication between the Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

